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Food additives data book - wordpres

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Antioxidants 118<br />

NAME: L-Tartaric acid<br />

CATEGORY: Sequestrant/ Synergist of antioxidant<br />

FOOD USE: Non-alcoholic beverages/ Ice-cream confectionery/ Baked products/ Desserts/ Chewing gum/<br />

Condiments/ Jam/ Jelly/ Canned vegetables and fruits<br />

SYNONYMS: L(+)-tartaric acid/ L-2,3-dihydroxybutane-dioic acid/ d-a-b-di-hydroxysuccinic acid/ 2,3dihydroxysuccinic<br />

acid/ E334/ potassium acid tartrate (cream of tartar, potassium bitartrate)<br />

FORMULA: COOH·CHOH·CHOH·COOH<br />

MOLECULAR MASS: 150.09<br />

ALTERNATIVE FORMS: Sodium tartrate (L-tartaric acid disodium salt)<br />

PROPERTIES AND APPEARANCE: Colourless or translucent crystals or white crystalline powder, odourless with acid taste<br />

MELTING RANGE IN °C: 168–170<br />

IONISATION CONSTANT AT 25°C: K1 = 1.04 ¥ 10-3 , pKa = 2.98<br />

K2 = 4.55 ¥ 10-3 , pKa = 4.34<br />

PURITY %: 99<br />

WATER CONTENT MAXIMUM IN %: 0.5<br />

HEAVY METAL CONTENT MAXIMUM IN 10<br />

ppm:<br />

ARSENIC CONTENT MAXIMUM IN ppm: 3<br />

ASH MAXIMUM IN %: 0.05<br />

SOLUBILITY % AT VARIOUS TEMPERATURE/pH COMBINATIONS:<br />

in water: @ 25°C 139<br />

in alcohol: @ 25°C 33

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